E9 error code (Quantum Series)Updated an hour ago
Introduction
The "E9" error code indicates the Intelligent Power Module (IPM) or compressor driving control is operating abnormally. The error code is for Quantum series systems.
Troubleshooting
If the unit stops operating for IPM protection six times consecutively, it will display the error code. The unit can't be recovered for operation, except by pressing the On/Off button.
